On Fri, Aug 26, 2005 at 09:37:36AM +1000, Benjamin Herrenschmidt was heard to remark:> On Fri, 2005-08-26 at 09:18 +1000, Paul Mackerras wrote:> > Benjamin Herrenschmidt writes:> > > > > Ok, so what is the problem then ? Why do we have to wait at all ? Why> > > not just unplug/replug right away ?> > > > We'd have to be absolutely certain that the driver could not possibly> > take another interrupt or try to access the device on behalf of the> > old instance of the device by the time it returned from the remove> > function. I'm not sure I'd trust most drivers that far...> > Hrm... If a driver gets that wrong, then it will also blow up when> unloaded as a module.

:) We've discovered two, so far, that blow up when unloaded: lpfc and e1000. I beleive these are now fixed in mainline.